On Quantum Gravity Tests with Composite Particles

Understand

Models of quantum gravity imply a fundamental revision of our description of position and momentum that manifests in modifications of the canonical commutation relations.

• Experimental tests of such modifications remain an outstanding challenge.
• These corrections scale with the mass of test particles, which motivates experiments using macroscopic composite particles.
• Here we consider a challenge to such tests, namely that quantum gravity corrections of canonical commutation relations are expected to be suppressed with increasing number of constituent particles.